This is their FLEPia technology which I've covered here in the past with previous posts:
And you can read the original article on Tech-On blog
As you can read, it actually a very small and short trial, but interesting all the same.
They are deliverying various content types to the reader at the restaurant table, hopefully not an indication they want to keep you entertained due to slow service!
When not in active use by a user it stands on the table as a small sign and cycles through train/metro timetables and adverts.